<!-- 详情页 -->
<template>
  <div class="details">
    <div class="details-header" ref="header">
      <!-- 头部内容 -->
      <i
        :class="['iconfont', 'icon-jiantou3', iconBg]"
        onclick="history.back()"
        ref="iconBg"
      ></i>
      <div class="details-tabs" ref="tabs">
        <ul>
          <li
            v-for="(detailsTab, index) in detailsTabs"
            :key="index"
            :class="tabsIndex == index ? 'active' : ''"
            @click="changeIndex(index)"
          >
            {{ detailsTab }}
          </li>
        </ul>
      </div>
      <i :class="['iconfont', 'icon-shoucang1', iconBg]"></i>
      <i :class="iconBg">...</i>
    </div>
    <div class="details-wrap">
      <!-- 商品内容信息 -->
      <div class="details-0 goods-info">
        <mt-swipe :show-indicators="false" @change="handleChange">
          <mt-swipe-item
            v-for="detailsItem in detailsSwiper"
            :key="detailsItem.id"
          >
            <img :src="detailsItem.pic" alt="" />
          </mt-swipe-item>
        </mt-swipe>
        <div class="mt-indicator">
          <strong>{{ current }}</strong
          >/
          <span>{{ detailsSwiper.length }}</span>
        </div>
        <!-- 商品的内容模块 -->
        <div class="details-content">
          <div class="details-price">
            <div class="shop_price">
              <span
                ><em>￥</em>
                <span>{{ detailsData.shopPrice | setInt }}</span>
                <em>{{ detailsData.shopPrice | setFloat }}</em>
              </span>
            </div>
            <div class="rebate_price">
              <span
                ><em>￥</em>
                <span>{{ detailsData.rebatePrice | setInt }}</span>
                <em>{{ detailsData.rebatePrice | setFloat }}</em>
              </span>
            </div>
            <!-- 已售 -->
            <span class="sold_out">已售{{ detailsData.sold_out }}件</span>
            <div class="details-share" @click="toshareFun">
              <i class="iconfont icon-fenxiang"></i>
              <span>分享</span>
            </div>
          </div>
          <div class="details-title">
            <h3 class="title">
              <em class="tag">自营</em>
              {{ detailsData.title }}
            </h3>
          </div>
        </div>
        <!-- 商品操作内容 -->
        <div class="goods_module_wrap">
          <div class="detail-item" @click="selectBuy">
            <div class="detail-item-left">
              <h3>已选</h3>
            </div>
            <div class="detail-item-right">
              <div class="tips">{{ buyNum }}件</div>
              <i class="iconfont icon-jiantou2"></i>
            </div>
          </div>
          <div class="detail-item" @click="citypopup">
            <div class="detail-item-left">
              <h3>送至</h3>
            </div>
            <div class="detail-item-right">
              <div class="tips">{{ province }}-{{ city }}-{{ area }}</div>
              <i class="iconfont icon-jiantou2"></i>
            </div>
          </div>
          <div class="detail-item">
            <div class="detail-item-left">
              <h3>运费</h3>
            </div>
            <div class="detail-item-right">
              <div class="tips">包邮</div>
            </div>
          </div>
          <div class="detail-item">
            <div class="detail-item-left">
              <h3>服务</h3>
            </div>
            <div class="detail-item-right">
              <div class="tips">支持7天无理由退货1</div>
              <i class="iconfont icon-jiantou2"></i>
            </div>
          </div>
        </div>
      </div>
      <!-- 评论 -->
      <div class="details-1 details-test goods-info">评论</div>
      <!-- 详情 -->
      <div class="details-2 details-test goods-info">详情</div>
      <!-- 推荐 -->
      <div class="details-3 details-test goods-info">推荐</div>
    </div>
    <!-- 加入购物车的弹框 -->
    <div class="select-buy">
      <mt-popup v-model="popupVisible" position="bottom">
        <div class="goods-wrap">
          <div class="goods-img">
            <img :src="detailsData.pic" alt="" />
          </div>
          <div class="goods-content">
            <div class="title">{{ detailsData.title }}</div>
            <div class="shop_price">
              <span
                ><em>￥</em>
                <span>{{ detailsData.shopPrice | setInt }}</span>
                <em>{{ detailsData.shopPrice | setFloat }}</em>
              </span>
            </div>
          </div>
          <i class="iconfont icon-round_delete" @click="closeselectpopup"></i>
        </div>
        <!-- 数量的内容 -->
        <div class="num-wrap">
          <h3>数量</h3>
          <div>
            <button class="minus" @click="buyNum > 1 ? buyNum-- : 1">-</button>
            <input type="text" v-model="buyNum" class="numtext" />
            <button class="add" @click="buyNum++">+</button>
          </div>
        </div>
        <!-- 加入购物车和立即购买 -->
        <div class="opa-wrap">
          <button class="addCart">加入购物车</button>
          <button class="buy">立即购买</button>
        </div>
      </mt-popup>
    </div>
    <!-- 城市选择的弹框 -->
    <div class="city-select">
      <mt-popup v-model="popupCityVisible" position="bottom">
        <h3>配送至</h3>
        <i class="iconfont icon-chahao" @click="closepopupCity"></i>
        <!-- 城市选择 -->
        <mt-picker :slots="slots" @change="onValuesChange"></mt-picker>
      </mt-popup>
    </div>
    <!-- 海报的组件显示 -->
    <create-poster
      v-if="showposter"
      :detailsData="detailsData"
      @closePoster="closePosterFun"
    ></create-poster>
    <!-- 底部内容 -->
    <div class="detail-footer">
      <div class="kefu">
        <i class="iconfont icon-kefu1"></i>
        <span>客服</span>
      </div>
      <div class="cart">
        <i class="iconfont icon-gouwuche"></i>
        <em>10</em>
        <span>购物车</span>
      </div>
      <button class="addCart">加入购物车</button>
      <button class="buy">立即购买</button>
    </div>
    <div style="height: 1000px"></div>
  </div>
</template>

<script>
//这里可以导入其他文件（比如：组件，工具js，第三方插件js，json文件，图片文件等等）
//例如：import 《组件名称》 from '《组件路径》';
import { provinces } from "@/mock/city.json";
import CreatePoster from "./components/CreatePoster.vue";
let provinceArr = [];
provinces.province.forEach(function (item) {
  provinceArr.push(item.ssqname);
});
console.log(provinceArr);
export default {
  //import引入的组件需要注入到对象中才能使用
  components: { CreatePoster },
  data() {
    //这里存放数据
    return {
      detailsTabs: ["商品", "评论", "详情", "推荐"],
      tabsIndex: 0,
      iconBg: "icon-bg",
      detailsSwiper: [
        {
          id: "1",
          pic: "https://x.dscmall.cn/storage/images/201703/goods_img/0_P_1489108266997.jpg",
        },
        {
          id: "2",
          pic: "https://x.dscmall.cn/storage/images/201703/goods_img/_P_1489108271727.jpg",
        },
        {
          id: "3",
          pic: "https://x.dscmall.cn/storage/images/201703/goods_img/_P_1489108271043.jpg",
        },
        {
          id: "4",
          pic: "https://x.dscmall.cn/storage/images/201703/goods_img/_P_1489108272459.jpg",
        },
      ],
      current: 1,
      detailsData: {
        shopPrice: 1299,
        rebatePrice: 3999,
        title:
          "华帝【年度旗舰】Huawei/华为 Mate 9 6+128GB 4G智能手机限量抢 麒麟960芯片 徕卡双镜头",
        sold_out: 4,
        pic: "https://x.dscmall.cn/storage/images/201703/goods_img/0_P_1489108266997.jpg",
      },
      popupVisible: false,
      buyNum: 1,
      popupCityVisible: false,
      slots: [
        {
          flex: 1,
          values: provinceArr,
          className: "slot1",
          textAlign: "right",
        },
        {
          divider: true,
          content: "-",
          className: "slot2",
        },
        {
          flex: 1,
          values: ["市辖区", "市辖县"],
          className: "slot3",
          textAlign: "center",
        },
        {
          divider: true,
          content: "-",
          className: "slot4",
        },
        {
          flex: 1,
          values: ["请选择"],
          className: "slot5",
          textAlign: "left",
        },
      ],
      province: "请选择",
      city: "请选择",
      area: "请选择",
      showposter: false,
    };
  },
  //监听属性 类似于data概念
  computed: {},
  //监控data中的数据变化
  watch: {},
  //方法集合
  methods: {
    changeIndex(index) {
      // 样式改变
      this.tabsIndex = index;
      // 元素距离上方的偏移
      // 元素窗口卷进去的距离
      let detailsELe = document.querySelector(".details-" + index);
      // console.log("点击");
      // console.log(detailsELe);
      // console.log(window.pageYOffset);
      // console.log(window.scrollY);
      var backDistance =
        detailsELe.offsetTop -
        window.pageYOffset -
        this.$refs.header.offsetHeight;
      // 缓慢进行滚动
      window.scrollBy({
        top: backDistance,
        behavior: "smooth",
      });
    },
    scrollpageFun() {
      // 头部样式的改变
      var scrollTop = document.documentElement.scrollTop;
      if (scrollTop > 50) {
        this.$refs.header.className = "details-header details-header-scroll";
        this.$refs.tabs.className = "details-tabs details-tabs-scroll";
        this.iconBg = "";
      } else {
        this.$refs.header.className = "details-header";
        this.$refs.tabs.className = "details-tabs";
        this.iconBg = "icon-bg";
      }

      // 关于头部滚动时切换tabs的active
      var detailsAllEle = document.querySelectorAll(".goods-info");
      var headerHeight = this.$refs.header.offsetHeight;
      for (var i = 0; i < detailsAllEle.length; i++) {
        if (window.scrollY + headerHeight + 100 >= detailsAllEle[i].offsetTop) {
          this.tabsIndex = i;
        }
      }
    },
    handleChange(index) {
      this.current = index + 1;
    },
    // 弹出购物车的popup
    selectBuy() {
      this.popupVisible = true;
    },
    closeselectpopup() {
      this.popupVisible = false;
    },
    // 弹出城市的选择框
    citypopup() {
      this.popupCityVisible = true;
    },
    closepopupCity() {
      this.popupCityVisible = false;
    },
    // 当省份选择时触发
    onValuesChange(picker, values) {
      let provincedata = provinces.province;
      // 设置市的数据
      var city = [];
      for (let i = 0; i < provincedata.length; i++) {
        if (values[0] == provincedata[i].ssqname) {
          for (let j = 0; j < provincedata[i].cities.city.length; j++) {
            city.push(provincedata[i].cities.city[j].ssqname);
          }
        }
      }
      picker.setSlotValues(1, city);
      // 设置县的数据
      let area = [];
      for (let i = 0; i < provincedata.length; i++) {
        if (values[0] == provincedata[i].ssqname) {
          for (let j = 0; j < provincedata[i].cities.city.length; j++) {
            if (values[1] == provincedata[i].cities.city[j].ssqname) {
              for (
                let k = 0;
                k < provincedata[i].cities.city[j].areas.area.length;
                k++
              ) {
                area.push(provincedata[i].cities.city[j].areas.area[k].ssqname);
              }
            }
          }
        }
      }

      picker.setSlotValues(2, area);
      // 设置页面上的数据
      this.province = values[0];
      this.city = values[1];
      this.area = values[2];
    },
    // 展示海报
    toshareFun() {
      this.showposter = true;
    },
    // 关闭海报
    closePosterFun(data) {
      console.log(data);
      this.showposter = data;
    },
  },

  //生命周期 - 挂载完成（可以访问DOM元素）
  mounted() {
    document.addEventListener("scroll", this.scrollpageFun);
  },
  beforeDestroy() {
    document.removeEventListener("scroll", this.scrollpageFun);
  },
};
</script>
<style lang="less">
// 局部引入--只是当前vue文件使用
// @import "~@/style/common.less";
.details {
  .details-header {
    width: calc(100% - 2rem);
    padding: 0 1rem;
    height: 5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 99;
    // background-color: #fff;
    background-color: transparent;
    transition: all 0.5s;
    color: #fff;
    i {
      width: 2.5rem;
      height: 2.5rem;
      text-align: center;
      line-height: 2.5rem;
      margin-right: 1.5rem;
      font-weight: 700;
    }
    .icon-bg {
      background-color: #999;
      border-radius: 50%;
    }
  }
  .details-header-scroll {
    color: #666;
    font-weight: 400;
    background-color: rgba(255, 255, 255, 0.95);
  }

  .details-tabs {
    width: 70%;
    opacity: 0;
    ul {
      display: flex;
      li {
        flex: 1;
        font-size: 1.5rem;
        color: #555;
        position: relative;
        text-align: center;
      }
      .active {
        color: #000;
        font-weight: 700;
        &::after {
          content: "";
          position: absolute;
          bottom: -0.5rem;
          left: 1.8rem;
          width: 2.6rem;
          height: 0.3rem;
          background: linear-gradient(90deg, #f91f28, rgba(255, 79, 46, 0.35));
        }
      }
    }
  }
  .details-tabs-scroll {
    opacity: 1;
  }
  .details-wrap {
    // 商品的内容
    .details-0 {
      .mint-swipe {
        width: 100%;
        height: 37.5rem;
        position: relative;
        img {
          width: 100%;
          height: 37.5rem;
        }
      }
      // 指示多少内容
      .mt-indicator {
        position: absolute;
        right: 0;
        top: 30rem;
        width: 5rem;
        height: 2.5rem;
        line-height: 2.5rem;
        border-top-left-radius: 1.25rem;
        border-bottom-left-radius: 1.25rem;
        text-align: center;
        color: #fff;
        font-size: 1.4rem;
        background-color: rgba(41, 47, 54, 0.4);
        z-index: 10;
      }
      .details-content {
        width: calc(100% - 2rem);
        padding: 1rem;
        background-color: #fff;
        border-radius: 0 0 1rem 1rem;
        .details-price {
          height: 5.9rem;
          display: flex;
          justify-content: space-between;
          align-items: center;
          .shop_price {
            font-size: 2.4rem;
            color: #f91f28;
          }
          .rebate_price {
            margin-left: -5rem;
            text-decoration: line-through;
            color: #999;
          }
          .sold_out {
            margin-left: -5rem;
            font-size: 1.4rem;
            color: #999;
          }
          // 分享
          .details-share {
            width: 4rem;
            height: 4rem;
            display: flex;
            margin-right: 0rem;
            flex-direction: column;
            font-size: 1.2rem;
            justify-content: center;
            align-items: center;
          }
        }
        .details-title {
          .title {
            font-size: 1.5rem;
            line-height: 1.5rem;
            // em {
            //   font-size: 1.2rem;
            //   padding: 0.1rem 0.4rem;
            //   background: linear-gradient(90deg, #f91f28, #ff4e2e);
            //   border-radius: 1.2rem;
            //   color: #fff;
            // }
            .tag {
              // 混入
              // .tag;
              // 命名空间
              .namespace > .tag;
            }
          }
        }
      }

      // 已选等
      .goods_module_wrap {
        width: calc(100% - 2rem);
        padding: 1rem;
        background: #fff;
        border-radius: 1rem;
        margin-top: 1rem;
        font-size: 1.4rem;
        .detail-item {
          display: flex;
          height: 5rem;
          justify-content: space-between;
          align-items: center;
          .detail-item-left {
            width: 15%;
            h3 {
              font-size: 1.6rem;
            }
          }
          .detail-item-right {
            width: 85%;
            height: 4rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1.4rem;
            border-bottom: 1px solid #efefef;
          }
        }
      }
    }
    .details-test {
      height: 60rem;
      background-color: pink;
      border: 1px solid red;
      margin-top: 2rem;
    }
  }
  .select-buy {
    .mint-popup {
      width: 100%;
      height: 27.7rem;
      border-radius: 1.5rem 1.5rem 0 0;
      background-color: #fff;
      .goods-wrap {
        width: calc(100% - 2rem);
        height: 12.8rem;
        padding: 1rem;
        display: flex;
        margin-top: 1rem;
        img {
          width: 9rem;
          height: 9rem;
        }
        .title {
          width: 24rem;
          height: 5.8rem;
          font-size: 1.4rem;
          margin-top: 1rem;
          // 多行文本省略号
          //   多行文本省略号
          display: -webkit-box;
          -webkit-box-orient: vertical;
          -webkit-line-clamp: 2;
          overflow: hidden;
        }
        .shop_price {
          color: #e22c2c;
          font-weight: 700;
          span {
            font-size: 1.5rem;
            em {
              font-size: 1.05rem;
            }
          }
        }
      }
      .num-wrap {
        display: flex;
        width: calc(100% - 2rem);
        height: 5rem;
        margin: 1rem;
        justify-content: space-between;
        align-items: center;
        h3 {
          font-size: 1.6rem;
        }
        div {
          button {
            width: 2rem;
            height: 2.6rem;
          }
          .numtext {
            width: 4rem;
            height: 2.6rem;
            text-align: center;
            background-color: #ccc;
          }
        }
      }
      .opa-wrap {
        button {
          width: 17rem;
          height: 4.2rem;
          margin: 0 0.5rem;
          border: none;
          font-size: 14px;
          font-weight: 700;
          color: #fff;
          border-radius: 2rem;
        }
        .addCart {
          background-color: #ffc707;
        }
        .buy {
          margin-left: 1rem;
          background-color: #f91f28;
        }
      }
    }
  }
  .city-select {
    position: relative;
    .mint-popup {
      width: 100%;
      height: 27.7rem;
      border-radius: 1.5rem 1.5rem 0 0;
      background-color: #fff;
      h3 {
        font-size: 1.6rem;
        text-align: center;
        color: #282828;
        font-weight: 700;
        margin-top: 1rem;
      }
      .icon-chahao {
        position: absolute;
        right: 2rem;
        top: 2rem;
      }
    }
  }
  .detail-footer {
    height: 4.9rem;
    border-top: 1px solid #ccc;
    width: 100%;
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    background: #fff;
    z-index: 99;
    justify-content: center;
    align-items: center;
    text-align: center;
    > div {
      flex: 1;
      display: flex;
      flex-direction: column;
      i {
        font-size: 2rem;
      }
    }
    button {
      border-radius: 2.2rem;
      font-weight: bold;
      height: 4.2rem;
      width: 12.5rem;
      margin-right: 1rem;
    }
    .addCart {
      background: #ffc707;
      color: #fff;
    }
    .buy {
      background: #f55;
      color: #fff;
    }
    .cart {
      position: relative;
      em {
        position: absolute;
        height: 1.5rem;
        min-width: 1.5rem;
        line-height: 1.5rem;
        font-size: 1rem;
        background: #fff;
        border: 0.1rem solid #f55;
        color: #f55;
        border-radius: 1rem;
        right: 0.5rem;
        top: -0.5rem;
      }
    }
  }
}
</style>